Bently Nevada ASSY78462-01AB – Relay Card | 3500 Series Machinery Protection System
Engineering Background
The Bently Nevada 3500 Series is the industry-standard platform for continuous online machinery protection in rotating equipment applications — including turbines, compressors, pumps, and generators. Deployed across oil & gas, power generation, petrochemical, and heavy industrial facilities worldwide, the 3500 rack architecture provides modular, scalable protection with deterministic relay output response. The ASSY78462-01AB Relay Card is a critical output module within this ecosystem, translating monitored parameter alarms into hardwired relay contact closures that drive field-side shutdown logic, annunciator panels, and DCS/PLC interlock inputs.
Product Positioning
The ASSY78462-01AB is a factory-assembled relay output card designed for direct installation into Bently Nevada 3500 Series protection racks. It provides the final hardwired link between the 3500 monitoring system and plant safety/shutdown infrastructure. Procurement engineers sourcing replacement or spare relay cards for 3500 racks will find this module to be a direct, form-fit-function compatible replacement for installed base units.
Complete Technical Specifications
| Manufacturer | Bently Nevada (Baker Hughes) |
| Part Number | ASSY78462-01AB |
| Module Type | Relay Output Card |
| Platform Compatibility | Bently Nevada 3500 Series Machinery Protection System |
| Output Type | Relay contact closure (hardwired) |
| Form Factor | 3500 rack-mount card module |
| Operating Temperature | 0°C to +60°C (typical 3500 Series specification) |
| Storage Temperature | -40°C to +85°C |
| Power Supply | Supplied via 3500 rack backplane |
| Approvals / Certifications | CE, SIL-rated per 3500 system documentation (verify with OEM datasheet for specific revision) |
| Weight | Approx. 200 g |
| Condition Available | Surplus / Refurbished / New (specify at inquiry) |
Note: Full electrical specifications (contact rating, coil voltage, response time) should be confirmed against the official Bently Nevada 3500 Series Relay Output Module datasheet for revision AB.
Proven Application Environments
- Oil & Gas: Upstream compressor trains, gas turbine protection racks, pipeline booster stations
- Power Generation: Steam turbine and gas turbine generator protection systems
- Petrochemical & Refining: Reactor feed pump protection, critical rotating equipment monitoring
- LNG Facilities: Main refrigerant compressor protection racks
- Marine & Offshore: Platform machinery protection systems requiring SIL-rated relay outputs
- Heavy Industry: Cement, mining, and steel plant rotating equipment protection
Engineering Advantages
- Direct Rack Compatibility: Designed as a plug-in module for the 3500 Series rack — no rewiring or adapter required for like-for-like replacement
- Hardwired Relay Output: Provides deterministic, fail-safe contact closure independent of network communication — critical for SIL-rated shutdown loops
- Modular Sparing Strategy: Enables hot-spare inventory management; a single card type covers multiple relay output channels within the rack
- Reduced MTTR: Card-swap replacement minimizes mean time to repair during unplanned outages, supporting plant availability targets
- OEM-Sourced Assembly: Factory-assembled and tested to Bently Nevada quality standards, ensuring relay contact integrity and long service life
System Architecture & Signal Flow
Within the 3500 rack, the ASSY78462-01AB Relay Card receives alarm/danger status signals from the 3500 monitor cards (vibration, position, temperature, etc.) via the rack backplane. Upon threshold crossing, the relay card energizes or de-energizes its output contacts, which are wired to field terminals connected to:
- Emergency Shutdown System (ESD) / Safety Instrumented System (SIS) inputs
- DCS alarm and interlock inputs
- Local annunciator panels and horn/beacon circuits
- Turbine/compressor trip solenoid valve circuits (via intermediate relay or directly, depending on contact rating)
The relay card operates in conjunction with the 3500/32 Relay Module or equivalent relay output architecture — confirm exact rack slot assignment and backplane wiring with the site-specific 3500 system drawing package.
Sourcing & Quality Verification
- Traceability: All units sourced from documented surplus channels, decommissioned plant spares, or authorized distributor stock
- Inspection: Visual inspection for physical damage, connector integrity, and board condition prior to dispatch
- Functional Testing: Available on request — specify test requirements at time of inquiry
- Warranty: 90-day replacement warranty on verified functional units (terms apply)
- Counterfeit Mitigation: Konmask does not source from unverified grey-market channels; provenance documentation available upon request
- Packaging: ESD-safe anti-static packaging with foam cushioning for international shipment
Procurement Process
- Submit Inquiry: Contact support@konmask.com or call +0086 19859288691 with your required quantity, condition preference (new / surplus / refurbished), and delivery timeline
- Quotation: Receive itemized quotation with unit price, lead time, and available condition/traceability documentation within 1 business day
- Order Confirmation: Confirm purchase order; payment terms discussed at quotation stage
- Quality Check & Dispatch: Unit inspected, packed in ESD-safe materials, and dispatched with tracking
- After-Sales Support: Technical queries and warranty claims handled directly by Konmask engineering support team
Technical FAQ
Q: Is the ASSY78462-01AB compatible with all 3500 Series rack configurations?
A: The ASSY78462-01AB is designed for the 3500 Series platform. Slot compatibility depends on your specific rack model and system configuration. Verify against your 3500 system drawing or contact Konmask with your rack part number for confirmation.
Q: Can this relay card be used in a SIL 2 rated protection loop?
A: The 3500 Series system is designed to support SIL-rated applications. The specific SIL capability of the ASSY78462-01AB relay card should be confirmed against the Bently Nevada functional safety documentation for your system revision.
Q: What is the lead time for this part?
A: Lead time depends on current stock availability. Contact Konmask for real-time availability. Surplus units typically ship within 3–7 business days; new OEM units may have longer lead times.
Q: Do you provide a certificate of conformance (CoC)?
A: Yes, documentation including CoC and inspection records is available upon request for verified units.
Q: Can Konmask source other Bently Nevada 3500 Series modules?
A: Yes. Konmask specializes in Bently Nevada, GE, Emerson, and other industrial automation components. Submit your full BOM or parts list for a consolidated quotation.
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Contact: support@konmask.com | +0086 19859288691
